Hello all, I'm using the directshow filters by Tobias. Yes I know they are not supported here :) The vorbis encoder (I really mean encoder, not decoder) by tobias works good in 2 channels mode, but with 6 channels it exchanges the order of channels while encoding. The front center goes to the front right, and the like. I have reported the problem, but Tobias gives no signs of life. I want to make a directshow filter which exchanges the 6 channels in the opposite way, to be applied before the vorbis encoder, so to fix the bug by Tobias. But I'm wondering if this would be a complete fix or not, because I don't know if or how Vorbis couples the channels when encoding; and I don't know if the current OggDS Vorbis encoder couples the channels before the bug or after the bug. Somebody who knows the libraries being used by Tobias could guess this better than me. Please tell <p>Also does anybody have a test pattern wave in 5.1 or 7.1? A wave where first you hear a sound in the front left, then one in the front right, then one in the front center, then in the subwoofer ... etc.? This would simplify my tests alot. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
"MiwongShaib" <miwongshaib@hotmail.com> schrieb im Newsbeitrag news:OE73U2EGeC7q0eniTS3000028b7@hotmail.com...> Hello all, I'm using the directshow filters by Tobias. Yes I know they arenot> supported here :) > The vorbis encoder (I really mean encoder, not decoder) by tobias worksgood in> 2 channels mode, but with 6 channels it exchanges the order of channelswhile> encoding. The front center goes to the front right, and the like.Gabriele, unfortunately there is no channel coupling used at all when doing 6 ch Vorbis encodings, thats why files are currently bigger than they should be ( had to be ). But i was bugging Monty already several times about it :-) . I am not sure, but maybe we'll see ambisonics support earlier in Vorbis than a proper 5.1 support .. lol BTW : did you test HeadAC3he and BeSweet also for 5.1 Vorbis encodings from AC3 sources ? Are they swobbing channel oder as well ? -- Christian Sites : http://mcf.sourceforge.net http://sf.net/projects/mcf MCF mailing lists : news://news.gmane.org gmane.comp.video.mcf.general gmane.comp.video.mcf.devel gmane.comp.video.mcf.mplayer gmane.comp.video.mcf.announce gmane.comp.video.mcf.mpc Soon : www.corecodec.com <p><p><p><p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
>> > unfortunately there is no channel coupling used at all when doing 6 >> ch Vorbis encodings, thats why files are currently bigger than they >> should > be >> Thanks for telling. >> This makes things easier for me: it's safer to patch the bug like this >> Just curious: is there any channel coupling when encoding 2ch (stereo) >> ? > > Of course there is, depending on q level. For q > 5 lossy mode is > disabled, thats why from 4.99 to 5.0 there is a rather huge jump in > bitrate.Where the input sound is ac3, is using 6-channel vorbis really preferable to using high quality mono vorbis or not converting the sound at all (given the oposition in the ogg community to reencoding)? Does ac3 use lossy channel coupling? I imagine that the bass channel is encoded differently to the others. How is it encoded? --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.